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Add a handler for ICMP Destination Unreachable #2544

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Add a handler for ICMP Destination Unreachable #2544

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bdb9130
[ICMPv6] Handle Destination Unreachable messages
audeoudh Jan 24, 2018
5e74130
[ICMPv6] Use general debug macros & functions
audeoudh Jan 24, 2018
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46 changes: 36 additions & 10 deletions core/net/ipv6/uip-icmp6.c
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Original file line number Diff line number Diff line change
Expand Up @@ -47,16 +47,8 @@
#include "net/ipv6/uip-icmp6.h"
#include "contiki-default-conf.h"

#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7], ((uint8_t *)addr)[8], ((uint8_t *)addr)[9], ((uint8_t *)addr)[10], ((uint8_t *)addr)[11], ((uint8_t *)addr)[12], ((uint8_t *)addr)[13], ((uint8_t *)addr)[14], ((uint8_t *)addr)[15])
#define PRINTLLADDR(lladdr) PRINTF(" %02x:%02x:%02x:%02x:%02x:%02x ",lladdr->addr[0], lladdr->addr[1], lladdr->addr[2], lladdr->addr[3],lladdr->addr[4], lladdr->addr[5])
#else
#define PRINTF(...)
#define PRINT6ADDR(addr)
#endif
#define DEBUG DEBUG_NONE
#include "net/ip/uip-debug.h"

#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
Expand Down Expand Up @@ -361,18 +353,52 @@ uip_icmp6_echo_reply_callback_rm(struct uip_icmp6_echo_reply_notification *n)
{
list_remove(echo_reply_callback_list, n);
}

/*---------------------------------------------------------------------------*/
static void
destination_unreachable_input(void)
{
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(": destination unreachable (");
switch(UIP_ICMP_BUF->icode) {
case ICMP6_DST_UNREACH_NOROUTE:
PRINTF("no route to destination");
break;
case ICMP6_DST_UNREACH_ADMIN:
PRINTF("communication with destination administratively prohibited");
break;
case ICMP6_DST_UNREACH_BEYONDSCOPE:
PRINTF("beyond scope of source address");
break;
case ICMP6_DST_UNREACH_ADDR:
PRINTF("address unreachable");
break;
case ICMP6_DST_UNREACH_NOPORT:
PRINTF("port unreachable");
break;
default:
printf("unknown reason code");
}
PRINTF(")\n");

return;
}

/*---------------------------------------------------------------------------*/
UIP_ICMP6_HANDLER(echo_request_handler, ICMP6_ECHO_REQUEST,
UIP_ICMP6_HANDLER_CODE_ANY, echo_request_input);
UIP_ICMP6_HANDLER(echo_reply_handler, ICMP6_ECHO_REPLY,
UIP_ICMP6_HANDLER_CODE_ANY, echo_reply_input);
UIP_ICMP6_HANDLER(destination_unreachable_handler, ICMP6_DST_UNREACH,
UIP_ICMP6_HANDLER_CODE_ANY, destination_unreachable_input);
/*---------------------------------------------------------------------------*/
void
uip_icmp6_init()
{
/* Register Echo Request and Reply handlers */
uip_icmp6_register_input_handler(&echo_request_handler);
uip_icmp6_register_input_handler(&echo_reply_handler);
uip_icmp6_register_input_handler(&destination_unreachable_handler);
}
/*---------------------------------------------------------------------------*/
/** @} */